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Jiang MJ, Li J, Luo CH, Zhu C, Chen ZJ, Bai W, Hu TY, Feng CH, Li C, Mo ZX. Rhynchophylline inhibits methamphetamine dependence via modulating the miR-181a-5p/GABRA1 axis. JOURNAL OF ETHNOPHARMACOLOGY 2023; 314:116635. [PMID: 37182675 DOI: 10.1016/j.jep.2023.116635] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2023] [Revised: 04/25/2023] [Accepted: 05/12/2023] [Indexed: 05/16/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Uncaria rhynchophylla (Miq.) Miq. ex Havil. is a plant species that is routinely devoted in traditional Chinese medicine to treat central nervous system disorders. Rhynchophylline (Rhy), a predominant alkaloid isolated from Uncaria rhynchophylla (Miq.) Miq. ex Havil., has been demonstrated to reverse methamphetamine-induced (METH-induced) conditioned place preference (CPP) effects in mice, rats and zebrafish. The precise mechanism is still poorly understood, thus further research is necessary. AIM OF STUDY This study aimed to investigate the role of miRNAs in the inhibitory effect of Rhy on METH dependence. MATERIALS AND METHODS A rat CPP paradigm and a PC12 cell addiction model were established. Microarray assays were used to screen and identify the candidate miRNA. Behavioral assessment, real-time PCR, dual-luciferase reporter assay, western blotting, stereotaxic injection of antagomir/agomir and cell transfection experiments were performed to elucidate the effect of the candidate miRNA and intervention mechanism of Rhy on METH dependence. RESULTS Rhy successfully reversed METH-induced CPP effect and the upregulated miR-181a-5p expression in METH-dependent rat hippocampus and PC12 cells. Moreover, suppression of miR-181a-5p by antagomir 181a reversed METH-induced CPP effect. Meanwhile, overexpression of miR-181a-5p by agomir 181a in combination with low-dose METH (0.5 mg/kg) elicited a significant CPP effect, which was blocked by Rhy through inhibiting miR-181a-5p. Finally, the result demonstrated that miR-181a-5p exerted its regulatory role by targeting γ-aminobutyric acid A receptor α1 (GABRA1) both in vivo and in vitro. CONCLUSION This finding reveals that Rhy inhibits METH dependence via modulating the miR-181a-5p/GABRA1 axis, which may be a promising target for treatment of METH dependence.
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Affiliation(s)
- Ming-Jin Jiang
- Jiangxi Provincial Institute of Translational Medicine, The First Affiliated Hospital of Nanchang University, Nanchang, 330006, China; School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, 510515, China.
| | - Jing Li
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, 510515, China.
| | - Chao-Hua Luo
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, 510515, China.
| | - Chen Zhu
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, 510515, China.
| | - Zhi-Jie Chen
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, 510515, China.
| | - Wei Bai
- Jiangxi Provincial Institute of Translational Medicine, The First Affiliated Hospital of Nanchang University, Nanchang, 330006, China.
| | - Tian-Yu Hu
- Jiangxi Provincial Institute of Translational Medicine, The First Affiliated Hospital of Nanchang University, Nanchang, 330006, China.
| | - Chuan-Hua Feng
- Jiangxi Provincial Institute of Translational Medicine, The First Affiliated Hospital of Nanchang University, Nanchang, 330006, China.
| | - Chan Li
- School of Life Sciences, Guangzhou University, Guangzhou, 510006, China.
| | - Zhi-Xian Mo
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, 510515, China.
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Jamali S, Dezfouli MP, Kalbasi A, Daliri MR, Haghparast A. Selective Modulation of Hippocampal Theta Oscillations in Response to Morphine versus Natural Reward. Brain Sci 2023; 13:brainsci13020322. [PMID: 36831866 PMCID: PMC9953863 DOI: 10.3390/brainsci13020322] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Revised: 02/08/2023] [Accepted: 02/09/2023] [Indexed: 02/16/2023] Open
Abstract
Despite the overlapping neural circuits underlying natural and drug rewards, several studies have suggested different behavioral and neurochemical mechanisms in response to drug vs. natural rewards. The strong link between hippocampal theta oscillations (4-12 Hz) and reward-associated learning and memory has raised the hypothesis that this rhythm in hippocampal CA1 might be differently modulated by drug- and natural-conditioned place preference (CPP). Time-frequency analysis of recorded local field potentials (LFPs) from the CA1 of freely moving male rats previously exposed to a natural (in this case, food), drug (in this case, morphine), or saline (control) reward cue in the CPP paradigm showed that the hippocampal CA1 theta activity represents a different pattern for entrance to the rewarded compared to unrewarded compartment during the post-test session of morphine- and natural-CPP. Comparing LFP activity in the CA1 between the saline and morphine/natural groups showed that the maximum theta power occurred before entering the unrewarded compartment and after the entrance to the rewarded compartment in morphine and natural groups, respectively. In conclusion, our findings suggest that drug and natural rewards could differently affect the theta dynamic in the hippocampal CA1 region during reward-associated learning and contextual cueing in the CPP paradigm.
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Affiliation(s)
- Shole Jamali
- Neuroscience Research Center, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran P.O. Box 19615-1178, Iran
| | - Mohsen Parto Dezfouli
- School of Cognitive Sciences, Institute for Research in Fundamental Sciences, Tehran P.O. Box 19395-5531, Iran
| | - AmirAli Kalbasi
- Department of Mechatronics, Faculty of Electrical Engineering, K. N. Toosi University of Technology, Tehran P.O. Box 16315-1355, Iran
| | - Mohammad Reza Daliri
- School of Cognitive Sciences, Institute for Research in Fundamental Sciences, Tehran P.O. Box 19395-5531, Iran
- Biomedical Engineering Department, School of Electrical Engineering, Iran University of Science and Technology, Tehran P.O. Box 16846-13114, Iran
- Correspondence: (M.R.D.); or (A.H.); Tel./Fax: +98-21-2243-1624 (A.H.)
| | - Abbas Haghparast
- Neuroscience Research Center, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran P.O. Box 19615-1178, Iran
- Correspondence: (M.R.D.); or (A.H.); Tel./Fax: +98-21-2243-1624 (A.H.)
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Involvement of GABAA receptors of lateral habenula in the acquisition and expression phases of morphine-induced place preference in male rats. Behav Pharmacol 2022; 33:452-465. [PMID: 36148835 DOI: 10.1097/fbp.0000000000000695] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
The lateral habenula (LHb) is a critical brain structure involved in the aversive response to drug abuse. It has been determined that the gamma-aminobutyric acid (GABA)-ergic system plays the main role in morphine dependency. The role of GABA type A receptors (GABAARs) in LHb on morphine-induced conditioned place preference (CPP) remains unknown. In this study, the effect of bilateral intra-LHb microinjection of GABAAR agonist and antagonist on the acquisition and expression phases of CPP, utilizing a 5-day CPP paradigm in male rats, was evaluated. Subcutaneous administration of different doses of morphine caused a dose-dependent CPP. Intra-LHb microinjection of the GABAAR agonist, muscimol, in combination with morphine (5 mg/kg; subcutaneously) enhanced CPP scores in the acquisition phase of morphine CPP, whereas the GABAAR antagonist, bicuculline, significantly reduced the conditioning scores in the acquisition phase. Furthermore, pretreatment with a high dose of bicuculline reversed the additive effect of muscimol during the acquisition phase, yet the low dose of antagonist had no significant effect on agonist-induced CPP scores. On the other hand, muscimol (3 µg/rat) significantly increased CPP scores in the expression phase but bicuculline did not induce a significant effect on CPP scores. Bicuculline and muscimol microinjections did not affect locomotor activity in the testing sessions. Our results confirm that GABAARs in LHb play an active role in morphine reward. In addition, microinjections of bicuculline/muscimol may alter the morphine response through the GABAergic system.
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Post-Weaning Treatment with Probiotic Inhibited Stress-Induced Amnesia in Adulthood Rats: The Mediation of GABAergic System and BDNF/c-Fos Signaling Pathways. Neurochem Res 2022; 47:2357-2372. [PMID: 35618945 DOI: 10.1007/s11064-022-03625-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2022] [Revised: 04/30/2022] [Accepted: 05/03/2022] [Indexed: 10/18/2022]
Abstract
The current study aimed to examine the effect of post-weaning treatment with probiotics on memory formation under stress during the adult period in male Wistar rats. Considering GABA is a potential mediator between probiotics and the host, the present study also investigated the involvement of the GABAergic system in the probiotic response. The hippocampal and prefrontal cortical (PFC) expression levels of BDNF and c-Fos were also assessed to show whether the treatments affect the memory-related signaling pathway. Three weeks after birth, the post-weaning rats were fed with probiotic water (PW) or tap water (TW) for 2, 3, 4, or 5 weeks. Exposure to acute stress impaired memory formation in a passive avoidance learning task. Feeding the post-weaning animals with probiotic strains (3, 4, or 5 weeks) inhibited stress-induced amnesia of the adult period. Post-training intracerebroventricular (ICV) microinjection of muscimol improved stress-induced amnesia in the animals fed with TW. ICV microinjection of muscimol inhibited probiotic treatment's significant effect on the stress response in the memory task. The expression levels of BDNF and c-Fos in the PFC and the hippocampus were significantly decreased in the stress animal group. The levels of BDNF and c-Fos were increased in the PW/stress animal group. The muscimol response was compounded with the decreased levels of BDNF and c-Fos in the PFC and the hippocampus. Thus, the GABA-A receptor mechanism may mediate the inhibitory effect of this probiotic mixture on stress-induced amnesia, which may be associated with the PFC and hippocampal BDNF/c-Fos signaling changes.
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Ghamkharinejad G, Marashi SH, Foolad F, Javan M, Fathollahi Y. Unconditioned and learned morphine tolerance influence hippocampal-dependent short-term memory and the subjacent expression of GABA-A receptor alpha subunits. PLoS One 2021; 16:e0253902. [PMID: 34500453 PMCID: PMC8428970 DOI: 10.1371/journal.pone.0253902] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2020] [Accepted: 06/15/2021] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND ɣ-aminobutyric acid (GABA) facilitator valproic acid may be able to curb memory disruption induced by morphine exposure. OBJECTIVE The effects of the GABA facilitator valproic acid on the behavioral tolerance induced by morphine were investigated. Then hippocampal-dependent tasks named spatial-working and short-term memory procedures using the Y-maze apparatus were examined in morphine tolerant rats. Finally, the changes in the expression of hippocampal GABA-A receptors underlying morphine tolerance were also examined. METHODS Rats were treated with daily morphine injections, with or without distinct contextual pairing. To examine the effect of valproic acid on morphine tolerance expression, valproic acid was pretreated an hour before morphine. Spatial-working and short-term memory procedures using the Y-maze apparatus were examined in morphine tolerant rats. Afterwards the changes in the expression of hippocampal GABAα receptors using the quantitative real-time PCR and western blot techniques to detect GABArα subunits mRNAs and protein level were studied. RESULTS Our results showed that both learned and non-associative morphine tolerance influence short-term memory and the subjacent expression of GABArα mRNAs and protein level. Despite its attenuating effects on the development and expression of both learned and non-associative morphine tolerance, only associative morphine tolerance-induced memory dysfunction was ameliorated by valproic acid pretreatment. We also found that the expression of GABArα1, α2, α5 subunits mRNAs and GABAα protein level were affected heavier in associative morphine tolerant rats. CONCLUSION Our data supports the hypothesis that unconditioned and learned morphine tolerance influences short-term memory and the expression of GABArα 1, α2, α5 mRNAs and GABArα protein level differently, and adds to our understanding of the behavioral and molecular aspects of the learned tolerance to morphine effects.
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Affiliation(s)
- Ghazaleh Ghamkharinejad
- Department of Physiology, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
| | - Seyed Hossein Marashi
- Department of Physiology, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
| | - Forough Foolad
- Department of Physiology, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
| | - Mohammad Javan
- Department of Physiology, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
| | - Yaghoub Fathollahi
- Department of Physiology, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
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Wang S, Zeng M, Ren Y, Han S, Li J, Cui W. In vivo reduction of hippocampal Caveolin-1 by RNA interference alters morphine addiction and neuroplasticity changes in male mice. Neurosci Lett 2021; 749:135742. [PMID: 33607203 DOI: 10.1016/j.neulet.2021.135742] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2020] [Revised: 01/29/2021] [Accepted: 02/12/2021] [Indexed: 11/29/2022]
Abstract
Prescription opioids are powerful pain-controlling medications that have both benefits and potentially serious risks. Morphine is one of the preferred analgesics that are widely used to treat chronic pain. However, chronic morphine exposure has been found to cause both functional and structural changes in several brain regions, including the medial prefrontal cortex (mPFC), ventral tegmental area (VTA), and hippocampus (HPC), which lead to addictive behavior. Caveolin-1 (Cav-1), a scaffolding protein of membrane lipid rafts (MLRs), has been shown to organize GPCRs and multiple synaptic signaling proteins within the MLRs to regulate synaptic signaling and neuroplasticity. Previously, we showed that in vitro morphine treatment significantly elevates Cav-1 expression and causes neuroplasticity changes. In this study, we confirmed that chronic morphine exposure can significantly increase Cav-1 expression (P < 0.05) and microtubule-associated protein (MAP-2)-positive neuronal dendritic growth in the hippocampus. Moreover, the rewarding effect and dendritic growth in the HPC induced by chronic morphine exposure were significantly inhibited by hippocampal Cav-1 knockdown. Together, these data suggest that Cav-1 in the hippocampus plays an essential role in the neuroplasticity changes that underlie morphine addiction behaviors.
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Affiliation(s)
- Shanshan Wang
- Department of Anesthesiology, Beijing Tian Tan Hospital, Capital Medical University, #119 Nan Si Huan Xi Lu, Beijing, 100050, PR China; Department of Anesthesiology, University of California San Diego, 3350 La Jolla Village Dr., San Diego, CA, 92161, USA
| | - Min Zeng
- Department of Anesthesiology, Beijing Tian Tan Hospital, Capital Medical University, #119 Nan Si Huan Xi Lu, Beijing, 100050, PR China
| | - Yi Ren
- Department of Anesthesiology, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, #56 Nan Li Shi Lu, Beijing, 100045, PR China
| | - Song Han
- Department of Neurobiology and Beijing Institute for Neuroscience, Capital Medical University, #10 You An Men Wai Xi TouTiao, Beijing, 100069, PR China
| | - Junfa Li
- Department of Neurobiology and Beijing Institute for Neuroscience, Capital Medical University, #10 You An Men Wai Xi TouTiao, Beijing, 100069, PR China
| | - Weihua Cui
- Department of Anesthesiology, Beijing Tian Tan Hospital, Capital Medical University, #119 Nan Si Huan Xi Lu, Beijing, 100050, PR China.
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Tavassoli M, Ardjmand A. Pentylenetetrazol and Morphine Interaction in a State-dependent Memory Model: Role of CREB Signaling. Basic Clin Neurosci 2021; 11:557-572. [PMID: 33613894 PMCID: PMC7878041 DOI: 10.32598/bcn.11.4.1482.1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2018] [Revised: 09/20/2018] [Accepted: 10/15/2019] [Indexed: 11/20/2022] Open
Abstract
Introduction: State-dependent (STD) memory is a process, in which the learned information can be optimally retrieved only when the subject is in the state similar to the encoding phase. This phenomenon has been widely studied with morphine. Several studies have reported that Pentylenetetrazole (PTZ) impairs memory in experimental animal models. Due to certain mechanistic interactions between morphine and PTZ, it is hypothesized that PTZ may interfere with the morphine-STD. The cyclic adenosine monophosphate Response Element-Binding (CREB) is considered as the main downstream marker for long-term memory. This study was designed to determine the possible interaction between PTZ and morphine STD and the presumable changes in CREB mRNA. Methods: In an Inhibitory Avoidance (IA) model, posttraining morphine (2.5, 5, and 7.5 mg/ kg-i.p.) was used. The pre-test morphine was evaluated for morphine-induced STD memory. Moreover, the effect of a pre-test PTZ (60 mg/kg-i.p.) was studied along with morphine STD. Locomotion testing was carried out using open-field. Eventually, using real-time-PCR, the CREB mRNA changes in the hippocampus were evaluated. Results: Posttraining MOR (7.5 mg/kg-i.p.) impaired IA memory (P<0.001). The pre-test injection of similar doses of morphine recovered the morphine-induced memory impairment (P<0.001). The pre-test PTZ impaired the IA memory recall (P<0.001); however, the pre-test PTZ along with morphine STD potentiated the morphine-induced STD (P<0.001). Alterations in CREB mRNA were observed in all groups. No difference was seen in the locomotor activity. Conclusion: Presumably, the certain interactive effect of PTZ on morphine-induced STD is mediated through gamma-aminobutyric acid and opioid systems via CREB signaling.
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Affiliation(s)
- Marziyeh Tavassoli
- Institute for Basic Sciences, Physiology Research Center, Kashan University of Medical Sciences, Kashan, Iran
| | - Abolfazl Ardjmand
- Institute for Basic Sciences, Physiology Research Center, Kashan University of Medical Sciences, Kashan, Iran.,Department of Physiology, School of Medicine, Kashan University of Medical Sciences, Kashan, Iran
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Alijanpour S, Jafaripour S, Ghasemzadeh Z, Khakpai F, Zarrindast MR. Harmaline potentiates morphine-induced antinociception via affecting the ventral hippocampal GABA-A receptors in mice. Eur J Pharmacol 2020; 893:173806. [PMID: 33345854 DOI: 10.1016/j.ejphar.2020.173806] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2019] [Revised: 12/06/2020] [Accepted: 12/10/2020] [Indexed: 11/13/2022]
Abstract
Morphine is one of the most effective medications for treatment of pain, but its side effects limit its use. Therefore, identification of new strategies that can enhance morphine-induced antinociception and/or reduce its side effects will help to develop therapeutic approaches for pain relief. Considering antinociceptive efficacy of harmaline and also highlighted the important role of GABA-A receptors in the pain perception, this research aimed to determine whether the ventral hippocampal (vHip) GABA-A receptors are involved in the possible harmaline-induced enhancement of morphine antinociception. To achieve this, vHip regions of adult male mice were bilaterally cannulated and pain sensitivity was measured in a tail-flick apparatus. Intraperitoneally administration of morphine (0, 2, 4 and 6 mg/kg) or harmaline (0, 1.25, 5 and 10 mg/kg) increased the percentage of maximal possible effect (%MPE) and induced antinociception. Interestingly, co-administration of sub-effective doses of harmaline (5 mg/kg) and morphine (2 mg/kg) induced antinociception. Intra-vHip microinjection of muscimol (0, 200 and 300 ng/mice), a GABA-A receptor agonist, enhanced the anti-nociceptive effects of harmaline (2.5 mg/kg)+morphine (2 mg/kg) combination. Microinjection of the same doses of muscimol into the vHip by itself did not alter tail-flick latency. Intra-vHip microinjection of bicuculline (100 ng/mouse), a GABA-A receptor antagonist, did not cause a significant change in MPE%. Bicuculline (60 and 100 ng/mouse, intra-vHip) was administered with the harmaline (5 mg/kg)+morphine (2 mg/kg), and inhibited the potentiating effect of harmaline on morphine response. These findings favor the notion that GABAergic mechanisms in the vHip facilitate harmaline-induced potentiation of morphine response in the tail-flick test in part through GABA-A receptors. These findings shall provide insights and strategies into the development of pain suppressing drugs.
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Affiliation(s)
- Sakineh Alijanpour
- Department of Biology, Faculty of Science, Gonbad Kavous University, Gonbad Kavous, Iran.
| | - Samira Jafaripour
- Department of Biology, North Tehran Branch, Islamic Azad University, Tehran, Iran
| | - Zahra Ghasemzadeh
- Department of Animal Biology, School of Biology, College of Science, University of Tehran, Tehran, Iran
| | - Fatemeh Khakpai
- Cognitive and Neuroscience Research Center (CNRC), Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
| | - Mohammad-Reza Zarrindast
- Department of Pharmacology, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran; Iranian National Center for Addiction Studies, Tehran University of Medical Sciences, Tehran, Iran; Endocrinology and Metabolism Research Center, Endocrinology and Metabolism Clinical Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran
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Etemad L, Farkhari H, Alavi MS, Roohbakhsh A. The Effect of Dihydromyricetin, a Natural Flavonoid, on
Morphine-induced Conditioned Place Preference and Physical Dependence in
Mice. Drug Res (Stuttg) 2020; 70:410-416. [DOI: 10.1055/a-1206-6757] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Abstract
Objective Dihydromyricetin (DHM), a natural flavonoid, is used to reduce
alcohol hangover. It has a modulatory role on GABAA receptors with significant
effects on seizure and anxiety in animal models. We aimed to evaluate the effect
of DHM on morphine conditioned place preference (CPP) and withdrawal sings
following morphine dependence using animal models.
Methods The effect of DHM (1, 2 and 5 mg/kg,
intraperitoneal; ip) on the acquisition and expression of morphine-induced CPP
was evaluated in male mice. Administration of morphine for three consecutive
days induced physical dependence. The withdrawal signs such as jumping and
defecation were precipitated by administration of naloxone
(8 mg/kg, ip). The effect of DHM on the development of physical
dependence was assessed by injection of DHM before morphine administrations.
Results DHM, at the dose of 5 mg/kg, reduced expression
of morphine CPP with an increase in the locomotor activity. DHM, at the doses of
2 and 5 mg/kg, also reduced development of morphine CPP. DHM
alleviated development of morphine-induced physical dependence at the dose of 1,
2, and 5 mg/kg by decreasing jumping and defecation.
Conclusion These results indicated that DHM decreased acquisition and
expression of morphine CPP and inhibited development of morphine-induced
physical dependence.
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Affiliation(s)
- Leila Etemad
- Pharmaceutical Research Center, Pharmaceutical Technology Institute,
Mashhad University of Medical Sciences, Mashhad, Iran
| | - Hadi Farkhari
- Department of Pharmacodynamics and Toxicology, School of Pharmacy,
Mashhad University of Medical Sciences, Mashhad, Iran
| | - Mohaddeseh Sadat Alavi
- Department of Pharmacology, Faculty of Medicine, Mashhad University of
Medical Sciences, Mashhad, Iran
- Division of Neurocognitive Sciences, Psychiatry and Behavioral Sciences
Research Center, Mashhad University of Medical Sciences, Mashhad,
Iran
| | - Ali Roohbakhsh
- Pharmaceutical Research Center, Pharmaceutical Technology Institute,
Mashhad University of Medical Sciences, Mashhad, Iran
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Hitchcock LN, Lattal KM. Involvement of the dorsal hippocampus in expression and extinction of cocaine-induced conditioned place preference. Hippocampus 2018; 28:226-238. [PMID: 29341327 DOI: 10.1002/hipo.22826] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2017] [Revised: 01/05/2018] [Accepted: 01/13/2018] [Indexed: 12/31/2022]
Abstract
A key aspect of substance abuse is that drug taking often occurs in a specific context. As a consequence, exposure to drug-associated contexts can trigger cravings and relapse, even after long periods of abstinence. Although many studies have demonstrated that the hippocampus is critical for developing and retrieving contextual and spatial memories, comparatively little is known about the role of the hippocampus in acquiring and inhibiting memories involving contexts and drugs of abuse. We examined the effects of hippocampal inactivation on expression of cocaine-induced conditioned place preference (CPP) after initial acquisition or extinction of CPP in C57BL/6 mice. During acquisition of CPP, distinct tactile cues were paired with cocaine (20 mg kg-1 , intraperitoneal, CS+) and different tactile cues were paired with saline (CS-) on alternate days. Groups differed in whether the CS+ and CS- cues were presented in the same large space (one-compartment procedure) or distinct small spaces (two-compartment procedure), as previous findings demonstrate that a two-compartment configuration facilitates acquisition and attenuates extinction of a cocaine-induced CPP. Microinjection of the GABAA agonist, muscimol, into the dorsal hippocampus impaired (1) retrieval of a place preference after acquisition, (2) extinction of a place preference, and (3) retrieval of extinction. These effects differed depending on the spatial configuration during acquisition or extinction, suggesting that the dorsal hippocampus may differentially modulate drug seeking during retrieval and extinction of CPP.
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Affiliation(s)
- Leah N Hitchcock
- Department of Behavioral Neuroscience, Oregon Health & Science University, Portland, Oregon
| | - K Matthew Lattal
- Department of Behavioral Neuroscience, Oregon Health & Science University, Portland, Oregon
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Ebrahimi-Ghiri M, Rostampour M, Jamshidi-Mehr M, Nasehi M, Zarrindast MR. Role of CA1 GABAA and GABAB receptors on learning deficit induced by D-AP5 in passive avoidance step-through task. Brain Res 2018; 1678:164-173. [DOI: 10.1016/j.brainres.2017.10.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2017] [Revised: 06/24/2017] [Accepted: 10/03/2017] [Indexed: 10/18/2022]
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Maleki M, Hassanpour-Ezatti M, Navaeian M. Cross State-dependent Learning Interaction Between Scopolamine and Morphine in Mice: The Role of Dorsal Hippocampus. Basic Clin Neurosci 2017; 8:193-202. [PMID: 28781727 PMCID: PMC5535325 DOI: 10.18869/nirp.bcn.8.3.193] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
INTRODUCTION The current study aimed at investigating the existence of the cross state-dependent learning between morphine and scopolamine (SCO) in mice by passive avoidance method, pointing to the role of CA1 area. METHODS The effects of pre-training SCO (0.75, 1.5, and 3 μg, Intra-CA1), or morphine (1, 3, and 6 mg/kg, intraperitoneal (i.p.) was evaluated on the retrieval of passive avoidance learning using step-down task in mice (n=10). Then, the effect of pretest administration of morphine (1.5, 3, and 6 mg/kg, i.p.) was examined on passive avoidance retrieval impairment induced by pre-training SCO (3 μg/mice, Intra-CA1). Next, the effect of pretest Intra-CA1 injection of scopolamine (0.75, 1.5, and 3 μg/mice) was evaluated on morphine (6 mg/kg, i.p.) pre-training deficits in this task in mice. RESULTS The pre-training Intra-CA1 injection of scopolamine (1.5 and 3 μg/mouse), or morphine (3 and 6 mg/kg, i.p.) impaired the avoidance memory retrieval when it was tested 24 hours later. Pretest injection of both drugs improved its pre-training impairing effects on mice memory. Moreover, the amnesia induced by the pre-training injections of scopolamine (3 μg/mice) was restored significantly (P<0.01) by pretest injections of morphine (3 and 6 mg/kg, i.p.). Similarly, pretest injection of scopolamine (3 μg/mice) restored amnesia induced by the pre-training injections of morphine (6 mg/kg, i.p.), significantly (P<0.01). CONCLUSION The current study findings indicated a cross state-dependent learning between SCO and morphine at CA1 level. Therefore, it seems that muscarinic and opioid receptors may act reciprocally on modulation of passive avoidance memory retrieval, at the level of dorsal hippocampus, in mice.
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Affiliation(s)
- Morteza Maleki
- Department of Biology, School of Basic Sciences, Shahed University, Tehran, Iran
| | | | - Majid Navaeian
- Department of Biology, Shahr Rey Branch, Islamic Azad University, Tehran, Iran
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Mohammadi R, Jahanshahi M, Jameie SB. 5-HT2A Serotonin Receptor Density in Adult Male Rats' Hippocampus after Morphine-based Conditioned Place Preference. Basic Clin Neurosci 2016; 7:249-58. [PMID: 27563418 PMCID: PMC4981837 DOI: 10.15412/j.bcn.03070310] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2015] [Revised: 04/01/2015] [Accepted: 08/02/2015] [Indexed: 11/25/2022] Open
Abstract
INTRODUCTION A close interaction exists between the brain opioid and serotonin (5-HT) neurotransmitter systems. Brain neurotransmitter 5-HT plays an important role in the regulation of reward-related processing. However, a few studies have investigated the potential role of 5-HT2A receptors in this behavior. Therefore, the aim of the present study was to assess the influence of morphine and Conditioned Place Preference (CPP) on the density of 5-HT2A receptor in neurons of rat hippocampal formation. METHODS Morphine (10 mg/kg, IP) was injected in male Wistar rats for 7 consecutive days (intervention group), but control rats received just normal saline (1 mL/kg, IP). We used a hotplate test of analgesia to assess induction of tolerance to analgesic effects of morphine on days 1 and 8 of injections. Later, two groups of rats were sacrificed one day after 7 days of injections, their whole brains removed, and the striatum and PFC immediately dissected. Then, the NR1 gene expression was examined with a semi-quantitative RT-PCR method. RESULTS Our data showed that the maximum response was obtained with 2.5 mg/kg of morphine. The density of 5-HT2A receptor in different areas of the hippocampus increased significantly at sham-morphine and CPP groups (P<0.05). On the other hand, the CPP groups had more 5-HT2A receptors than sham-morphine groups and also the sham-morphine groups had more 5-HT2A receptors than the control groups. CONCLUSION We concluded that the phenomenon of conditioned place preference induced by morphine can cause a significant increase in the number of serotonin 5-HT2A receptors in neurons of all areas of hippocampus.
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Affiliation(s)
- Rabie Mohammadi
- Department of Anatomy, Neuroscience Research Center, Faculty of Medicine, Golestan University of Medical Sciences, Gorgan, Iran
| | - Mehrdad Jahanshahi
- Department of Anatomy, Neuroscience Research Center, Faculty of Medicine, Golestan University of Medical Sciences, Gorgan, Iran
| | - Seyed Behnamedin Jameie
- Department of Anatomy, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
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Effects of dorsal hippocampal orexin-2 receptor antagonism on the acquisition, expression, and extinction of morphine-induced place preference in rats. Psychopharmacology (Berl) 2016; 233:2329-41. [PMID: 27048158 DOI: 10.1007/s00213-016-4280-3] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/02/2015] [Accepted: 03/22/2016] [Indexed: 10/22/2022]
Abstract
RATIONALE Orexinergic system is involved in reward processing and drug addiction. OBJECTIVES Here, we investigated the effect of intrahippocampal CA1 administration of orexin-2 receptor (OX2r) antagonist on the acquisition, expression, and extinction of morphine-induced place preference in rats. METHODS Conditioned place preference (CPP) was induced by subcutaneous injection of morphine (5 mg/kg) during a 3-day conditioning phase. Three experimental plots were designed; TCS OX2 29 as a selective antagonist of orexin-2 receptors (OX2rs) was dissolved in DMSO, prepared in solutions with different concentrations (1, 3, 10, and 30 nM), and was bilaterally microinjected into the CA1 and some neighboring regions (0.5 μl/side). Conditioning scores and locomotor activities were recorded during the test. RESULTS Results demonstrate that intra-CA1 administration of the OX2r antagonist attenuates the induction of morphine CPP during the acquisition and expression phases. Effect of TCS OX2 29 on reduction of morphine CPP was dose-dependent and was more pronounced during the acquisition than the expression. Furthermore, higher concentrations of TCS OX2 29 facilitated the extinction of morphine-induced CPP and reduced extinction latency period. Nevertheless, administration of TCS OX2 29 solutions did not have any influence on locomotor activity of all phases. CONCLUSIONS Our findings suggest that OX2rs in the CA1 region of hippocampus are involved in the development of the acquisition and expression of morphine CPP. Moreover, blockade of OX2rs could facilitate extinction and may abrogate or extinguish the ability of drug-related cues, implying that the antagonist might be considered as a propitious therapeutic agent in suppressing drug-seeking behavior.
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Mague SD, Port RG, McMullen ME, Carlson GC, Turner JR. Mouse model of OPRM1 (A118G) polymorphism has altered hippocampal function. Neuropharmacology 2015; 97:426-35. [PMID: 25986698 DOI: 10.1016/j.neuropharm.2015.04.032] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2014] [Revised: 04/08/2015] [Accepted: 04/27/2015] [Indexed: 01/08/2023]
Abstract
A single nucleotide polymorphism (SNP) in the human μ-opioid receptor gene (OPRM1 A118G) has been widely studied for its association in a variety of drug addiction and pain sensitivity phenotypes; however, the extent of these adaptations and the mechanisms underlying these associations remain elusive. To clarify the functional mechanisms linking the OPRM1 A118G SNP to altered phenotypes, we used a mouse model possessing the equivalent nucleotide/amino acid substitution in the Oprm1 gene. In order to investigate the impact of this SNP on circuit function, we used voltage-sensitive dye imaging in hippocampal slices and in vivo electroencephalogram recordings of the hippocampus following MOPR activation. As the hippocampus contains excitatory pyramidal cells whose activity is highly regulated by a dense network of inhibitory neurons, it serves as an ideal structure to evaluate how putative receptor function abnormalities may influence circuit activity. We found that MOPR activation increased excitatory responses in wild-type animals, an effect that was significantly reduced in animals possessing the Oprm1 SNP. Furthermore, in order to assess the in vivo effects of this SNP during MOPR activation, EEG recordings of hippocampal activity following morphine administration corroborated a loss-of-function phenotype. In conclusion, as these mice have been shown to have similar MOPR expression in the hippocampus between genotypes, these data suggest that the MOPR A118G SNP results in a loss of receptor function.
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Affiliation(s)
- Stephen D Mague
- Department of Pharmacology, University of Pennsylvania School of Medicine, Philadelphia, PA 19104, USA
| | - Russell G Port
- Department of Psychiatry, University of Pennsylvania School of Medicine, Philadelphia, PA 19104, USA
| | - Michael E McMullen
- Department of Psychiatry, University of Pennsylvania School of Medicine, Philadelphia, PA 19104, USA
| | - Greg C Carlson
- Department of Psychiatry, University of Pennsylvania School of Medicine, Philadelphia, PA 19104, USA
| | - Jill R Turner
- Department of Drug Discovery and Biomedical Sciences, South Carolina College of Pharmacy, University of South Carolina, Columbia, SC 29036, USA.
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Raybuck JD, Lattal KM. Differential effects of dorsal hippocampal inactivation on expression of recent and remote drug and fear memory. Neurosci Lett 2014; 569:1-5. [PMID: 24686177 DOI: 10.1016/j.neulet.2014.02.063] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2013] [Revised: 02/21/2014] [Accepted: 02/24/2014] [Indexed: 01/08/2023]
Abstract
Drugs of abuse generate strong drug-context associations, which can evoke powerful drug cravings that are linked to reinstatement in animal models and to relapse in humans. Work in learning and memory has demonstrated that contextual memories become more distributed over time, shifting from dependence on the hippocampus for retrieval to dependence on cortical structures. Implications for such changes in the structure of memory retrieval to addiction are unknown. Thus, to determine if the passage of time alters the substrates of conditioned place preference (CPP) memory retrieval, we investigated the effects of inactivation of the dorsal hippocampus (DH) with the GABA-A receptor agonist muscimol on expression of recent or remote CPP. We compared these effects with the same manipulation on expression of contextual fear conditioning. DH inactivation produced similar deficits in expression of both recent and remote CPP, but blocked expression of recent but not remote contextual fear memory. We describe the implications of these findings for mechanisms underlying long-term storage of contextual information.
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Affiliation(s)
- J D Raybuck
- Department of Behavioral Neuroscience, Oregon Health & Science University, 3181 SW Sam Jackson Park Road L470, Portland, OR 97239-3098, USA.
| | - K M Lattal
- Department of Behavioral Neuroscience, Oregon Health & Science University, 3181 SW Sam Jackson Park Road L470, Portland, OR 97239-3098, USA.
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Aminoguanidine Changes Hippocampal Expression of Apoptosis-Related Genes, Improves Passive Avoidance Learning and Memory in Streptozotocin-Induced Diabetic Rats. Cell Mol Neurobiol 2013; 34:343-50. [DOI: 10.1007/s10571-013-0018-5] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2013] [Accepted: 12/04/2013] [Indexed: 12/15/2022]
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Role of dorsal hippocampal orexin-1 receptors in associating morphine reward with contextual stimuli. Behav Pharmacol 2013; 24:237-48. [PMID: 23787292 DOI: 10.1097/fbp.0b013e3283635ee9] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
In this study, we evaluated the role of orexin receptors in the dorsal hippocampus (dHPC) in the development of morphine-induced conditioned place preference (CPP) and modification of hippocampal c-Fos and cyclic AMP response element-binding protein (CREB) levels. Orexin-A (0.5, 5, and 50 pmol) and the orexin-1 receptor antagonist, SB334867 (10, 20, and 40 nmol), were bilaterally infused into the dHPC immediately before conditioning with morphine (0.5 or 7.5 mg/kg) using the CPP task. Western blotting was then used to measure the protein levels of c-Fos, total CREB, and phosphorylated CREB (pCREB) in the hippocampus. Orexin did not enhance the rewarding efficacy of morphine (0.5 mg/kg), but caused a reduction in hippocampal c-Fos. Successful conditioning with morphine (7.5 mg/kg) was associated with increased levels of hippocampal c-Fos and CREB, but with decreased CREB phosphorylation. Intrahippocampal administration of SB334867 before conditioning sessions disrupted the rewarding effect of morphine (7.5 mg/kg) and blocked morphine-induced increases in hippocampal CREB protein levels. The results suggest that orexin signaling within the dHPC is necessary for the development of morphine CPP. Morphine reward is related to altered levels of hippocampal c-Fos and CREB. Inhibition of morphine-induced increases in CREB levels might be the underlying mechanism for the disruption of morphine CPP.
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Raccuglia D, Mueller U. Focal uncaging of GABA reveals a temporally defined role for GABAergic inhibition during appetitive associative olfactory conditioning in honeybees. Learn Mem 2013; 20:410-6. [PMID: 23860600 DOI: 10.1101/lm.030205.112] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Throughout the animal kingdom, the inhibitory neurotransmitter γ-aminobutyric acid (GABA) is a key modulator of physiological processes including learning. With respect to associative learning, the exact time in which GABA interferes with the molecular events of learning has not yet been clearly defined. To address this issue, we used two different approaches to activate GABA receptors during appetitive olfactory conditioning in the honeybee. Injection of GABA-A receptor agonist muscimol 20 min before but not 20 min after associative conditioning affects memory performance. These memory deficits were attenuated by additional training sessions. Muscimol has no effect on sensory perception, odor generalization, and nonassociative learning, indicating a specific role of GABA during associative conditioning. We used photolytic uncaging of GABA to identify the GABA-sensitive time window during the short pairing of the conditioned stimulus (CS) and the unconditioned stimulus (US) that lasts only seconds. Either uncaging of GABA in the antennal lobes or the mushroom bodies during the CS presentation of the CS-US pairing impairs memory formation, while uncaging GABA during the US phase has no effect on memory. Uncaging GABA during the CS presentation in memory retrieval also has no effect. Thus, in honeybee appetitive olfactory learning GABA specifically interferes with the integration of CS and US during associative conditioning and exerts a modulatory role in memory formation depending on the training strength.
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Affiliation(s)
- Davide Raccuglia
- Department 8.3 Biosciences Zoology/Physiology-Neurobiology, ZHMB Center of Human and Molecular Biology, Faculty 8-Natural Science and Technology III, Saarland University, D-66041 Saarbrücken, Germany
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Torkaman-Boutorabi A, Soltani S, Oryan S, Ebrahimi-Ghiri M, Torabi-Nami M, Zarrindast MR. Involvement of the dorsal hippocampal GABA-A receptors in histamine-induced facilitation of memory in the Morris water maze. Pharmacol Biochem Behav 2013; 105:142-50. [PMID: 23438692 DOI: 10.1016/j.pbb.2013.02.007] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/06/2012] [Revised: 02/11/2013] [Accepted: 02/13/2013] [Indexed: 01/31/2023]
Abstract
Several types of learning and memory processes are regulated by the hippocampus which is an important subcortical structure in the mammalians' brain. Previous investigations have shown that different receptor systems in the CA1 region of hippocampus are involved in learning and memory functions. Investigating the possible influence of dorsal hippocampal GABA-A receptors on histamine-induced spatial facilitation in adult male Wistar rats was the focus of the current study. Rats were bilaterally implanted with dorsal hippocampal (CA1) cannulae, recovered from surgery and then trained in Morris water maze (MWM) for 4 consecutive days. A block of four trials was given each day. All drugs were injected into CA1 regions, 5min before training. Pre-training intra-CA1 microinjection of muscimol, a GABA-A receptor agonist, at the dose of 0.01 or 0.02μg/rat, increased the traveled distance or the escape latency and traveled distance to the hidden platform, respectively, indicating a water maze spatial acquisition impairment. Intra-CA1 administration of bicuculline, a GABA-A receptor antagonist however, significantly decreased the escape latency and traveled distance to the hidden platform, suggesting a spatial learning facilitation. On the other hand, pre-training intra-CA1 microinjection of the subthreshold dose of muscimol plus different doses of histamine (0.025, 0.05 and 0.1μg/rat) did not alter the histamine response. Meanwhile, the co-administration of the ineffective dose of bicuculline together with histamine potentiated the spatial learning. Moreover, bilateral infusion of histamine (0.025, 0.05 and 0.1μg/rat) by itself, facilitated the spatial learning. Notably, the drug injections had no effect on swimming speed during the MWM training sessions. Our results suggest that the dorsal hippocampal (CA1) GABA-A mechanism(s) may influence the histamine-induced facilitation of spatial acquisition.
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Affiliation(s)
- Anahita Torkaman-Boutorabi
- Department of Neuroscience, School of Advanced Technologies in medicine, Tehran University of Medical Sciences, Tehran, Iran
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Budzynska B, Polak P, Biala G. Effects of calcium channel antagonists on the motivational effects of nicotine and morphine in conditioned place aversion paradigm. Behav Brain Res 2011; 228:144-50. [PMID: 22178315 DOI: 10.1016/j.bbr.2011.12.003] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2011] [Revised: 11/29/2011] [Accepted: 12/02/2011] [Indexed: 12/19/2022]
Abstract
The motivational component of drug withdrawal may contribute to drug seeking and relapse through the negative reinforcement-related process; thus, it is important to understand the mechanisms that mediate affective withdrawal behaviors. The present study was undertaken to examine the calcium-dependent mechanism of negative motivational symptoms of nicotine and morphine withdrawal using the conditioned place aversion (CPA) paradigm. Rats were chronically treated with nicotine (1.168 mg/kg, free base, s.c., 11 days, three times daily) or morphine (10 mg/kg,s.c., 11 days, twice daily). Then, during conditioning, rats pre-treated with nicotine or morphine received a nicotinic receptor antagonist mecamylamine (3.5 mg/kg) or an opioid receptor antagonist naloxone (1 mg/kg) to precipitate withdrawal in their initially preferred compartment, or saline in their non-preferred compartment. Our results demonstrated that after three conditioning sessions, mecamylamine induced a clear place aversion in rats that had previously received nicotine injections, and naloxone induced a significant place aversion in rats that had previously received morphine injections. Further, the major findings showed that calcium channel antagonists, i.e., nimodipine, verapamil and flunarizine (5 and 10 mg/kg, i.p.), injected before the administration of mecamylamine or naloxone, attenuated nicotine or morphine place aversion. As an outcome, these findings support the hypothesis that similar calcium-dependent mechanisms are involved in aversive motivational component associated with nicotine a morphine withdrawal. We can suggest that calcium channel blockers have potential for alleviating nicotine and morphine addiction by selectively decreasing the incentive motivational properties of both drugs, and may be beneficial as smoking cessation or opioid dependence pharmacotherapies.
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Affiliation(s)
- Barbara Budzynska
- Department of Pharmacology and Pharmacodynamics, Medical University of Lublin, 4A Chodzki Street, 20-093 Lublin, Poland
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Rezayof A, Sardari M, Zarrindast MR, Nayer-Nouri T. Functional interaction between morphine and central amygdala cannabinoid CB1 receptors in the acquisition and expression of conditioned place preference. Behav Brain Res 2011; 220:1-8. [PMID: 21262265 DOI: 10.1016/j.bbr.2011.01.023] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2010] [Revised: 01/12/2011] [Accepted: 01/13/2011] [Indexed: 11/17/2022]
Abstract
The present study was done to determine whether cannabinoid CB1 receptors of the central amygdala (CeA) are implicated in morphine-induced place preference. Using a 3-day schedule of conditioning, it was found that subcutaneous (s.c.) administration of morphine (2, 4 and 6 mg/kg) caused a significant dose-dependent conditioned place preference (CPP) in male Wistar rats. Intra-CeA microinjection of the cannabinoid CB1 receptor agonist arachidonylcyclopropylamide (ACPA; 0.5, 2.5 and 5 ng/rat) dose-dependently potentiated the morphine (2mg/kg)-induced CPP. Furthermore, the administration of ACPA (5 ng/rat, intra-CeA) alone induced a significant CPP. It should be considered that the higher dose of ACPA (5 ng/rat, intra-CeA) in combination with morphine decreased locomotor activity on the testing phase. On the other hand, intra-CeA microinjection of the cannabinoid CB1 receptor antagonist AM251 (120 ng/rat) alone induced a significant conditioned place aversion (CPA). Moreover, intra-CeA microinjection of AM251 (90 and 120 ng/rat) inhibited the morphine-induced place preference with a significant interaction. Intra-CeA microinjection of AM251 reversed the effect of ACPA on morphine response. Interestingly, microinjection of ACPA (2.5 and 5 ng/rat) or AM251 (60-120 ng/rat) into the CeA increased or decreased the expression of morphine (6 mg/kg)-induced place preference respectively. These observations provide evidence that cannabinoid CB1 receptors of the CeA are involved in mediating reward and these receptors are also implicated in the acquisition and expression of morphine-induced CPP.
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Affiliation(s)
- Ameneh Rezayof
- Department of Animal Biology, School of Biology, College of Science, University of Tehran, Tehran, Iran.
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Rassouli Y, Rezayof A, Zarrindast MR. Role of the central amygdala GABA-A receptors in morphine state-dependent memory. Life Sci 2010; 86:887-93. [DOI: 10.1016/j.lfs.2010.04.006] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2009] [Revised: 04/07/2010] [Accepted: 04/12/2010] [Indexed: 10/19/2022]
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Biala G, Staniak N. Varenicline and mecamylamine attenuate locomotor sensitization and cross-sensitization induced by nicotine and morphine in mice. Pharmacol Biochem Behav 2010; 96:141-7. [PMID: 20451547 DOI: 10.1016/j.pbb.2010.04.022] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/03/2009] [Revised: 04/19/2010] [Accepted: 04/28/2010] [Indexed: 11/29/2022]
Abstract
The present study focused on the evaluation of behavioural sensitization and cross-sensitization induced by nicotine and morphine in mice. First, we revealed that after 9days of nicotine administration (0.175mg/kg, free base), every other day and following its 7-day withdrawal, challenge doses of nicotine (0.175mg/kg) and morphine (5mg/kg) induced locomotor sensitization in mice. When we examined the influence of varenicline, a partial alpha4beta2 nicotinic receptor agonist (0.5, 1 and 2mg/kg) and mecamylamine (0.5, 1 and 2mg/kg), a non-selective nicotinic receptor antagonist, we found that both agents attenuated the acquisition and expression of nicotine sensitization as well as locomotor cross-sensitization between nicotine and morphine. Our results indicate similar cholinergic mechanisms involved in the locomotor stimulant effects of nicotine and morphine in mice, and as such these data may suggest that nicotinic neurotransmission could be a potential target for developing pharmacotherapeutic strategies to treat and prevent nicotine and/or opioid addiction.
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Affiliation(s)
- Grazyna Biala
- Department of Pharmacology and Pharmacodynamics, Medical University of Lublin, 4 Staszica Street, 20-081 Lublin, Poland.
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Lecourtier L, de Vasconcelos AP, Cosquer B, Cassel JC. Combined lesions of GABAergic and cholinergic septal neurons increase locomotor activity and potentiate the locomotor response to amphetamine. Behav Brain Res 2010; 213:175-82. [PMID: 20450937 DOI: 10.1016/j.bbr.2010.04.050] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2010] [Revised: 04/24/2010] [Accepted: 04/28/2010] [Indexed: 10/19/2022]
Abstract
Potentiated locomotor response to amphetamine has been associated with an increased sensitivity of the dopaminergic system and used as a model of the positive symptoms of schizophrenia in rodents. The hippocampus, through the subiculum, modulates dopamine transmission and hippocampal or subicular lesions potentiate the locomotor response to amphetamine. However, little is known about the upstream structures controlling hippocampal/subicular activity towards the regulation of dopamine transmission. The main modulatory input to the hippocampus is the septal area, composed of the medial septum and vertical limb of the diagonal band of Broca (MS/vDBB). The so-called septohippocampal pathway includes cholinergic and GABAergic fibers reaching the hippocampus through the fimbria-fornix. While electrolytic lesions of the MS/vDBB potentiate the locomotor response to amphetamine, cholinergic damage in the MS/vDBB does not affect this response. Moreover, the role of the GABAergic connections has never been investigated. Therefore, we performed in rats lesions of cholinergic or/and GABAergic septal neurons and assessed locomotor activity, (i) in an unfamiliar environment, (ii) under baseline conditions (separating light-on and light-off periods) and (iii) in response to an amphetamine challenge. While single lesions had no effects, rats with combined lesions were hyperactive in all three conditions. Thus, damage to cholinergic and GABAergic septohippocampal neurons induced locomotor alterations qualitatively comparable to those produced by hippocampal and/or subicular lesions. Our results further suggest that the septum, through both cholinergic and GABAergic fibers, modulates the functional contribution of the hippocampus/subiculum in the regulation of mesolimbic dopamine transmission.
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Affiliation(s)
- Lucas Lecourtier
- Laboratoire d'Imagerie et de Neurosciences Cognitives, FRE 3289, Université de Strasbourg-CNRS, 12 rue Goethe, Strasbourg, France
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Hou YY, Liu Y, Kang S, Yu C, Chi ZQ, Liu JG. Glutamate receptors in the dorsal hippocampus mediate the acquisition, but not the expression, of conditioned place aversion induced by acute morphine withdrawal in rats. Acta Pharmacol Sin 2009; 30:1385-91. [PMID: 19767765 PMCID: PMC4007332 DOI: 10.1038/aps.2009.130] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2009] [Accepted: 07/15/2009] [Indexed: 11/09/2022] Open
Abstract
AIM To evaluate the role of glutamate receptors in the dorsal hippocampus (DH) in the motivational component of morphine withdrawal. METHODS NMDA receptor antagonist D-AP5 (5 microg/0.5 microL per side) or AMPA receptor antagonist NBQX (2 microg/0.5 microL per side) was microinjected into DH of rats. Conditioned place aversion (CPA) induced by naloxone-precipitated morphine withdrawal were assessed. RESULTS Preconditioning microinjection of D-AP5 or NBQX into the DH impaired the acquisition of CPA in acute morphine-dependent rats. However, intra-DH microinjection of D-AP5 or NBQX after conditioning but before the testing session had no effect on the expression of CPA. CONCLUSION Our results suggest that NMDA and AMPA receptors in the dorsal hippocampus are involved in the acquisition, but not in the expression, of the negative motivational components of acute morphine withdrawal in rats.
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Affiliation(s)
- Yuan-yuan Hou
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
| | - Yao Liu
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
| | - Shuo Kang
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
| | - Chuan Yu
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
| | - Zhi-qiang Chi
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
| | - Jing-gen Liu
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
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Khatibi A, Haghparast A, Shams J, Dianati E, Komaki A, Kamalinejad M. Effects of the fruit essential oil of Cuminum cyminum L. on the acquisition and expression of morphine-induced conditioned place preference in mice. Neurosci Lett 2008; 448:94-8. [DOI: 10.1016/j.neulet.2008.10.042] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2008] [Revised: 09/17/2008] [Accepted: 10/14/2008] [Indexed: 11/25/2022]
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Abstract
This paper is the thirtieth consecutive installment of the annual review of research concerning the endogenous opioid system. It summarizes papers published during 2007 that studied the behavioral effects of molecular, pharmacological and genetic manipulation of opioid peptides, opioid receptors, opioid agonists and opioid antagonists. The particular topics that continue to be covered include the molecular-biochemical effects and neurochemical localization studies of endogenous opioids and their receptors related to behavior, and the roles of these opioid peptides and receptors in pain and analgesia; stress and social status; tolerance and dependence; learning and memory; eating and drinking; alcohol and drugs of abuse; sexual activity and hormones, pregnancy, development and endocrinology; mental illness and mood; seizures and neurologic disorders; electrical-related activity and neurophysiology; general activity and locomotion; gastrointestinal, renal and hepatic functions; cardiovascular responses; respiration and thermoregulation; and immunological responses.
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Affiliation(s)
- Richard J Bodnar
- Department of Psychology and Neuropsychology Doctoral Sub-Program, Queens College, City University of New York, 65-30 Kissena Blvd.,Flushing, NY 11367, United States.
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Zarrindast MR, Hoghooghi V, Rezayof A. Inhibition of morphine-induced amnesia in morphine-sensitized mice: Involvement of dorsal hippocampal GABAergic receptors. Neuropharmacology 2008; 54:569-76. [DOI: 10.1016/j.neuropharm.2007.11.004] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2007] [Revised: 11/03/2007] [Accepted: 11/08/2007] [Indexed: 11/25/2022]
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Zarrindast MR, Nouri M, Ahmadi S. Cannabinoid CB1 receptors of the dorsal hippocampus are important for induction of conditioned place preference (CPP) but do not change morphine CPP. Brain Res 2007; 1163:130-7. [PMID: 17631872 DOI: 10.1016/j.brainres.2007.06.015] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2007] [Revised: 06/02/2007] [Accepted: 06/05/2007] [Indexed: 11/22/2022]
Abstract
Interactions between cannabinoid and opioid systems have been reported in many studies. In the present study, we have investigated influence of cannabinoid CB1 receptor mechanism on the acquisition of conditioned place preference (CPP) induced by morphine in male Wistar rats. The cannabinoid CB1 receptor agonist (WIN55,212-2) and antagonist (AM251) were injected bilaterally into the dorsal hippocampus. Morphine and naloxone were injected subcutaneously (s.c.). The conditioning treatments with injections of morphine (6 and 9 mg/kg) induced a CPP for the drug-associated place. When administered into the dorsal hippocampus, WIN55,212-2 (1 microg/rat) induced CPP, but significantly did not alter CPP induced by a sub-effective dose of morphine (3 mg/kg). Moreover, administration of different doses of AM251 (50 and 100 ng/rat) into the dorsal hippocampus induced CPP, while did not change CPP by the sub-effective dose of morphine. Naloxone alone (1 mg/kg) induced conditioned place aversion (CPA). The drug (0.5 and 1 mg/kg) also caused CPA when co-administered with WIN55,212-2 (1 microg/rat). These results suggest that endocannabinoid system in the dorsal hippocampus is important for the CPP paradigm. However, agents did not alter morphine-induced CPP.
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Affiliation(s)
- Mohammad-Reza Zarrindast
- Department of Pharmacology and Iranian National Center for Addiction Studies, Medical Sciences, University of Tehran, Iran.
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Zarrindast MR, Sattari-Naeini M, Khalilzadeh A. Involvement of glucose and ATP-sensitive potassium (K+) channels on morphine-induced conditioned place preference. Eur J Pharmacol 2007; 573:133-8. [PMID: 17655841 DOI: 10.1016/j.ejphar.2007.06.044] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2007] [Revised: 06/23/2007] [Accepted: 06/28/2007] [Indexed: 11/30/2022]
Abstract
In the present study, the effects of glucose and ATP-sensitive K+ channel compounds on the acquisition of morphine-induced place preference in male mice were investigated. Subcutaneous administration of different doses of morphine (2.5-7.5 mg/kg) produced a dose-dependent conditioned place preference. With a 3-day conditioning schedule, it was found that glucose (100, 200, 500 and 1000 mg/kg), diazoxide (15, 30 and 60 mg/kg) or glibenclamide (3, 6 and 12 mg/kg) did not produce significant place preference or place aversion. Intraperitoneal administration of the glucose (1000 mg/kg) or glibenclamide (6 and 12 mg/kg) with a lower dose of morphine (0.5 mg/kg) elicited the significant conditioned place preference. The response of glibenclamide (6 mg/kg) was reversed by diazoxide (15, 30 and 60 mg/kg). Drug injections had no effects on locomotor activity during the test sessions. It is concluded that glucose and the ATP-sensitive K+ channel may play an active role in morphine reward.
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Affiliation(s)
- Mohammad R Zarrindast
- Department of Pharmacology and Iranian National Center for addiction Studies, Medical Sciences, University of Tehran, Iran.
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Rezayof A, Nazari-Serenjeh F, Zarrindast MR, Sepehri H, Delphi L. Morphine-induced place preference: Involvement of cholinergic receptors of the ventral tegmental area. Eur J Pharmacol 2007; 562:92-102. [PMID: 17336285 DOI: 10.1016/j.ejphar.2007.01.081] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2006] [Revised: 01/24/2007] [Accepted: 01/24/2007] [Indexed: 10/23/2022]
Abstract
In the present study, the effects of intra-ventral tegmental area injections of cholinergic agents on morphine-induced conditioned place preference were investigated by using an unbiased 3-day schedule of place conditioning design in rats. The conditioning treatments with subcutaneous injections of morphine (0.5-7.5 mg/kg) induced a significant dose-dependent conditioned place preference for the drug-associated place. Intra-ventral tegmental area injection of an anticholinesterase, physostigmine (2.5 and 5 microg/rat) or nicotinic acetylcholine receptor agonist, nicotine (0.5 and 1 microg/rat) with an ineffective dose of morphine (0.5 mg/kg) elicited a significant conditioned place preference. Furthermore, intra-ventral tegmental area administration of muscarinic acetylcholine receptor antagonist, atropine (1-4 microg/rat) or nicotinic acetylcholine receptor antagonist, mecamylamine (5 and 7.5 microg/rat) dose-dependently inhibited the morphine (5 mg/kg)-induced place preference. Atropine or mecamylamine reversed the effect of physostigmine or nicotine on morphine response respectively. The injection of physostigmine, but not atropine, nicotine or mecamylamine, into the ventral tegmental area alone produced a significant place aversion. Moreover, intra-ventral tegmental area administration of the higher doses of physostigmine or atropine, but not nicotine or mecamylamine decreased the locomotor activity. We conclude that muscarinic and nicotinic acetylcholine receptors in the ventral tegmental area may critically mediate the rewarding effects of morphine.
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Affiliation(s)
- Ameneh Rezayof
- School of Biology, University College of Science, University of Tehran, Tehran, Iran.
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Rezayof A, Golhasani-Keshtan F, Haeri-Rohani A, Zarrindast MR. Morphine-induced place preference: Involvement of the central amygdala NMDA receptors. Brain Res 2007; 1133:34-41. [PMID: 17184750 DOI: 10.1016/j.brainres.2006.11.049] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2006] [Revised: 11/05/2006] [Accepted: 11/16/2006] [Indexed: 11/21/2022]
Abstract
In the present study, the effects of bilateral injections of N-methyl-d-aspartate (NMDA) receptor agonist and/or antagonist into the central amygdala (CeA) on the acquisition and expression of morphine-induced conditioned place preference (CPP) were investigated in male Wistar rats. Animals that received 3 daily subcutaneous (s.c.) injections of morphine (1-9 mg/kg) or saline (1.0 ml/kg) indicated a significant preference for compartment paired with morphine in a dose dependent manner. Intra-CeA administration of the NMDA (0.01, 0.1 or 1 microg/rat) with an ineffective dose of morphine (1 mg/kg, s.c.) elicited a significant CPP. Administration of the non-competitive NMDA receptor antagonist, MK-801 (0.1, 0.3 or 0.5 microg/rat), into the central amygdala dose-dependently inhibited the morphine (6 mg/kg, s.c.)-induced place preference. Furthermore, intra-CeA administration of MK-801 (0.25, 0.5 or 1 microg/rat) reduced the response induced by NMDA (1 microg/rat, intra-CeA) plus morphine (1 mg/kg, s.c.). Neither NMDA nor MK-801 alone produce a significant place preference or place aversion. Moreover, intra-CeA injection of NMDA but not MK-801 before testing significantly increased the expression of morphine (6 mg/kg, s.c.)-induced place preference. NMDA or MK-801 injections into the CeA had no effects on locomotor activity on the testing sessions. These results suggest that the NMDA receptor mechanisms in the central amygdala may be involved in the acquisition and expression of morphine-induced place preference.
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Affiliation(s)
- Ameneh Rezayof
- School of Biology, University College of Science, University of Tehran, P. O. Box 14155-6455, Tehran, Iran.
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